Accessibility

A statistical result is only useful if you can actually get to it. Every engine on this site works with a keyboard alone, exposes its inputs and results to screen readers and other assistive technology, and remains usable on a phone-sized screen, not only a desktop browser.

What this means concretely

• Every input has a real, programmatically associated label, not just placeholder text.
• Results are announced to assistive technology when they update, not only shown visually.
• Meaning is never conveyed through color alone. Where a result is flagged (for example, a confidence interval crossing zero), it is also stated in text.
• Charts and other visual diagnostics, where they exist, have a textual equivalent.
• Progressive disclosure (showing advanced options only when needed) never hides information that assistive technology needs to expose the essential result.
• Tables remain readable on narrow screens rather than being cut off or requiring horizontal scrolling to read a single row.

Reporting a problem

If you run into an accessibility barrier anywhere on this site, use the Contact page to describe what happened and which calculator or page was involved.